Stanley 35-100 Compulevel Level Ziplevel Altimeter

Hi George:
I'm used to barometric pressure as related to altimeter setting in aircraft, but the principal is the same.
For an altimeter, If you know the elevation (above sea level) that you are at, and you set the altimeter to that altitude, the barometric pressure showing on the altimeter will be the current barometric pressure.
If you have a barometer without an altimeter, someone would have to provide you with the current setting. That would probably be your nearest weather station, airport, or your computer.
Here's a link to one.
http://weather.gc.ca/marine/weatherConditions-currentConditions_e.html?mapID=02&siteID=14300&stationID=46131
Pressure and tendency refers to barometric pressure.
If you reply as a COMMENT to this post I will try to assist if possible.
Cheers.

Select a location that is relatively level and flat.
The edge of a bench is best so that the level can be placed in the same position when the level is rotated during the calibration process.

To calibrate follow below:

Press and hold Calibrate button for about 4 seconds. The display will now show CAL1.

Press the Calibrate button briefly again and the 1 will flash, a beep will be heard and CAL2 will be displayed.

Rotate the level 180° end to end with the display still facing you whilst the level is now upside down. Place the level in the same location.

Press the Calibrate button briefly one last time. The 2 will flash, a beep will be heard and the display will revert back to normal.

--0--
periodic flash on the display indicates re-zero required due to temperature change

Timex Helix ABT.
This watch calculates altitude by measuring air pressure and relating that value to the international standard atmosphere. 1013.25 mb = 0 metres.
The Timex ABT does not display negative altitude values. So if the measured air pressure is greater than 1013.25 mb and the altimeter is reset (select altimeter, pull out the crown 1 click and press and hold the lower left button) the watch will display LO. You can experiment with this. Wait till the barometer reads 1013 or 1012 and reset the altimeter. The watch will display zero or maybe 5 metres. Or wait till the pressure goes up to, say, 1022 and reset the altimeter. The watch will read LO again. If this happens alot, you probably live fairly close to sea level. What you can do to trick the watch is use a vacuum cleaner to raise the perceived altitude of the watch then calibrate the altimeter (pull out and rotate the crown) and change the altimeter reading to, say, 200 metres. It wont read LO then. Keep an eye on it and the atmospheric pressure. If the pressure starts to rise then adjust the altimeter accordingly. Remember this watch is designed to measure proper altitudes where the air pressure isnt likely to be as high as 1013.25. If you are mooching around near sea level the naturally changing air pressure will often make the watch read LO.
If you live up in Montana at 1500 metres (ISA standard pressure about 840 mb) all the time then the watch will always read a positive value and you can calibrate it from reference to a map or road sign etc. The atmospheric pressure will unlikely reach as high as 1013 up there and the watch wont read LO.

Erik, the altimeter uses barometric pressure to determine changes in elevation. Rule one is whenever you know the elevation for a fact, adjust it as the barometer is changing often and therefore affecting the altimeter reading. The only sure way to avoid this is use GPS. Altitude is derived from locating 3 or 4 satellites in a geo syncrohnus(SP?) orbit. Pilots always reset the altimeter before take off and you should too. Find elevations on road signs, maps, etc.

satreece,

The only location that you can get service for the Stanley COMPULEVEL is from Technidea Corporation. A standard factory recharge for the Stanley COMPULEVEL 35-100 Elevation Measurement System is $150.00 and includes a thorough evaluation, R&R of the liquid, recharge of the pressurizing gas, testing, cleaning and repackaging, and complimentary return shipping via UPS Ground to all locations in the US and Canada.

An electronics upgrade is also available for your COMPULEVEL, allowing 2X faster and 3X more accurate measuring and significantly more stable readings. COMPULEVEL upgrades start at $195.00, plus the cost of the standard recharge.

For detailed instructions on how and where to send your COMPULEVEL for service, please visit www.ziplevel.com and click on the 'Service' tab at the top of the page. If you would like to upgrade your COMPULEVEL, please include a brief note with your unit when you send it in for service.


Contact information for Technidea is below.



800.805.LEVEL
760.480.4740 Office
760.480.4738 Fax
[email protected]
www.ziplevel.com

You have acouple of options

You can buy a measuring tool that doesn't have a size limit or has a very high size limit, you can check around to find one that will suit your needs.

You can measure the till the end of you measuring tool, mark the spot where it ends, and make another measuerment from that spot.

Another option is to take a long piece of string, and run it between the two points you want to measure, Cut the rope exactly between the two points, and later you can measure it, section by section, this is a lot of work!

I'm sure that these aren't all the possible methods, I think that folks around here might add a few.

Good luck

Some models have the Barometric Altimeter which needs to be calibrated, and some units do not.

Vertical Accuracy of a properly calibrated Barometric Altimeter is +/- 10'. If you have a unit that uses provides a GPS Elevation only, a +/- 50' vertical solution is pretty standard.